421813641 has 8 divisors (see below), whose sum is σ = 564338880. Its totient is φ = 280248752.

The previous prime is 421813619. The next prime is 421813669. The reversal of 421813641 is 146318124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421813641 - 2⁶ = 421813577 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421813599 and 421813608.

It is not an unprimeable number, because it can be changed into a prime (421813141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239061 + ... + 240818.

It is an arithmetic number, because the mean of its divisors is an integer number (70542360).

Almost surely, 2^421813641 is an apocalyptic number.

It is an amenable number.

421813641 is a deficient number, since it is larger than the sum of its proper divisors (142525239).

421813641 is a wasteful number, since it uses less digits than its factorization.

421813641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480175.

The product of its digits is 4608, while the sum is 30.

The square root of 421813641 is about 20538.1021761992. The cubic root of 421813641 is about 749.9636373481.

The spelling of 421813641 in words is "four hundred twenty-one million, eight hundred thirteen thousand, six hundred forty-one".